Psychemedics Corporation provides testing services for the detection of abused substances through the analysis of hair samples. The Company's testing methods utilize a patented technology for performing immunoassays on enzymatically dissolved hair samples with confirmation testing by mass spectrometry. The Company provides commercial testing and confirmation by mass spectrometry using industry-accepted practices for cocaine, marijuana, PCP, methamphetamine (including Ecstasy, which is difficult to detect in urine due to sporadic use patterns and rapid clearance from the body) and opiates. In addition, Psychemedics has developed a test for methadone for use in the drug treatment industry. Testing services are performed at the Company's laboratory in Culver City, California. Its services are marketed under the name RIAH (Radioimmunoassay of Hair).